Modelling the steady state deformation stress under various deformation conditions using a single irreversible thermodynamics based formulation

Huang, Mingxin and Rivera-Díaz-del-Castillo, Pedro E.J. and Bouaziz, Olivier and Zwaag, Sybrand van der (2009) Modelling the steady state deformation stress under various deformation conditions using a single irreversible thermodynamics based formulation. Acta Materialia, 57 (12). pp. 3431-3438. ISSN 1359-6454

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Abstract

A new unified description for the steady state deformation stress in single and polycrystalline metals and for various deformation conditions is presented. The new formulation for dislocation controlled deformation stems from the field of irreversible thermodynamics. The model applies to conditions of dynamic recovery as well as dynamic recrystallization and has been validated for constant strain rate and creep loading conditions. Unlike existing approaches, the new model captures transitions between deformation mechanisms within a single formulation. For conditions of dynamic recrystallization, the average dislocation density is found to be a function of the shear strain rate and a term combining the dislocation climb velocity and the grain boundary velocity.

Item Type: Journal Article
Journal or Publication Title: Acta Materialia
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/2500/2506
Subjects:
Departments: Faculty of Science and Technology > Engineering
ID Code: 125493
Deposited By: ep_importer_pure
Deposited On: 24 May 2018 14:06
Refereed?: Yes
Published?: Published
Last Modified: 19 Feb 2020 04:36
URI: https://eprints.lancs.ac.uk/id/eprint/125493

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